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CUDA: Do not create CMAKE_CUDA_HOST_COMPILER cache entry

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Users can create it through an explicit command-line option if desired.

Initializing the variable as an empty cache entry can wipe out a normal
variable of the same name that may have been set by a toolchain file.
Since commit v3.8.0-rc1~261^2~11 (CUDA: Use the host compiler for
linking CUDA executables and shared libs, 2016-09-19) we save the value
of `CMAKE_CUDA_HOST_COMPILER` persistently in the compiler information
file as a normal variable.

Fixes: #17935
This commit is contained in:
Brad King
2018-04-24 10:09:19 -04:00
parent 3db4092329
commit bff4651f2e
1 changed files with 0 additions and 1 deletions
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Modules/CMakeDetermineCUDACompiler.cmake
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@@ -40,7 +40,6 @@ else()
endif()
#Allow the user to specify a host compiler
set(CMAKE_CUDA_HOST_COMPILER "" CACHE FILEPATH "Host compiler to be used by nvcc")
if(NOT $ENV{CUDAHOSTCXX} STREQUAL "")
get_filename_component(CMAKE_CUDA_HOST_COMPILER $ENV{CUDAHOSTCXX} PROGRAM)
if(NOT EXISTS ${CMAKE_CUDA_HOST_COMPILER})